The following script illustrates the problem:

<?PHP
   $results["a"] = 1;
   $results["b"] = 3;
   $results["c"] = 4;
   $results["d"] = 2;
   echo min($results) . "\n";
   echo max($results) . "\n";
   if( is_array($results) )
      echo "yes, \$results is an array\n";
?>

Comment-out the lines using min/max and the output indicates
that the variable is in fact an array.  According to the PHP3
documentation, min/max on an array should work (the larger
application in which this crashes is the survey demo from
PHP/FI2).

Leave the min/max lines uncommented and there will be no
trace of any problems - browser says document contains no
data, server returns no headers or part page, with full
pedantic warnings/errors/logging enabled, PHP's error log
file contains nothing, server's log file contains nothing,
there is even no evidence of the request in the server's
access log!  Server just ups and crashes without trace (sorry,
no core dump).

Environment is Debian/GNU Linux 1.3 (kernel 2.0.33, libc
5.4.33, gcc 2.7.2.1), Apache 1.2.6, PHP 3.0RC;  PHP has
support for GD and MySQL compiled-in (not modules).